I Buy Low and Sell High in the Heavens!

One day Fang Yu got a system. This system allows him to travel back and forth across the heavens and worlds. So he thought of doing business Buy technology at low prices on Wandering Earth. Selling black technology at a high price in the industrial era. Purchase large amounts of food during the era of agricultural development. In ancient times, grain was sold at high prices. As long as it is profitable, he will definitely have a share. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.